Volume 1 (1967)

Title Page

Editorial

Contents

SUR LE NÉCESSITÉ DE LANCER UN NOUVEAU SATELLITE ARTIFICIEL SPÉCIAL – UNE „LUNE ARTIFICIELLE“
N. Boneff (in French)

CORRÉLATION ENTRE L’APLATISSEMENT, LA MASSE ET LE NOMBRE DES SATELLITES DES PLANÈTES DU SYSTÈME SOLAIRE
N. Boneff, R. Roussev (in Bulgarian, Summary in French)

ÜBER EINIGE EXAKTE LÖSUNGEN DER MEHRDIMENSIONALEN GRAVITATIONSTHEORIE,
WELCHE ANWENDUNG IN DER ASTRONOMIE UND IN DER PHYSIK FINDEN KÖNNEN
N. St. Kalitzin (in German)

STUDY OF BULGARIA’S ASTROCLIMATE
V. Dobrichev, B. Kovachev (in Bulgarian, Summary in English)

ON THE CHANGE IN THE INTENSITIES OF SPECTRAL LINES IN THE ECLIPSING VARIABLE STAR 68u HERCULIS
B. Kovachev (in Russian, Summary in English)

ON THE DETERMINATION OF FUNCTIONS N(m) AND A(m)
V. Dobrichev, D. Raikova

STUDY OF OBSCURED FIELDS IN PA 793
M. Kalinkov, V. Dobrichev

A STATISTICAL VERIFICATION OF A HYPOTHESIS FOR QUASARS
L.-A. Sadowsky, M. Kalinkov

INVESTIGATION ON CLUSTERS AND GROUPS OF CLUSTERS OF GALAXIES
M. Kalinkov

HOUR ANGLES WITH REFRACTION CORRECTION FOR THE RISING AND SETTING OF CELESTIAL BODIES
FOR THE OBSERVATORY IN SOFIA (φ = +42° 41' 02'')
V. Dobrichev, L.-A. Sadowsky (in Bulgarian, Summary in English)

VARIATIONS IN THE IONISING RADIATION OF THE IONOSPHERIC E-LAYER
K. Serafimov (in Bulgarian, Summary in English)